/Engine/Plugins/Experimental/GeometryScripting/Source/GeometryScriptingCore/Public/GeometryScript/ShapeFunctions.h
Get the Plane at the Transform Location with the Plane Normal aligned with the direction of the X/Y/Z axis of the Transform, ie the Direction Vector resulting from transforming the unit direction vectors (1,0,0) / etc
static FPlane GetTransformAxisPlane ( FTransform Transform, [EGeometryScriptAxis](API\Plugins\GeometryScriptingCore\GeometryScript\EGeometryScriptAxis) Axis )